Operation Mode - Circutor AR5-L Instruction Manual

1.2.- Operation mode

The analyzer takes 40 samples per cycle between the L1 and Neutral voltage
inputs when working in single-phase mode. The analyzer takes 40 samples per
phase and cycle when working in three-phase mode (40x3=120 samples per cycle).
The difference between each sample and the previous one is calculated by the
analyzer, so that this difference is then compared with the maximum slope
calculated. That way, whether the difference between two successive samples
exceeds the maximum slope, a disturbance is considered to be occurred.
This sample is compared with an user-defined voltage value (% over Vp). In
case that positive and negative limits are not exceeded when the 40 samples have
been captured, a sag has occurred.
The maximum slope is determined in function of the previously user-defined
values for the rated voltage and trigger (when the analyzer is turn on); or every time
these values are modified by keyboard (Set-up menu).
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